若反比例函数的图象过点(-1,2),则它的解析式为( )
y=-
顶管施工,在顶进过程中的测量工作,主要包括中线测量和()。
A.边线测量
B.曲线测量
C.转角测量
D.高程测量
The photoperiodic response of algae actually depends on the duration of darkness, but not on the response of light.
A.is not on light B.but is’ not on the lightC.and not on light D.the light is not on